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(Left) An HR-TEM image showing the small areas with 10 Å d spacings (labelled b) included in the general ∼14 Å d spacings (labelled a) of smectite (ESB6 sample). Note the very small 10 Å areas commonly show different features since they have a straight and regular grid with 10 Å spacing, free of dislocations, stacking faults and edge dislocations.
